CN106907271A - It is a kind of to reclaim the device that exhaust pipe of engine waste heat improves engine synthesis oil consumption utilization rate - Google Patents

Abstract

The present invention provides a kind of device for reclaiming exhaust pipe of engine waste heat raising engine synthesis oil consumption utilization rate, including ethanol feedway A, alcohol catalysis device B and ethene feedway C；Ethanol feedway A includes ethanol case, connecting tube, liquid pump and overflow valve；Alcohol catalysis device B includes evaporator, accumulator, connecting tube, air pump, catalyst converter and exhaust manifold；Ethene feedway C includes connecting tube, discharging valve, separator, inlet manifold and engine.The air inlet of the vaporization chamber of evaporator, air pump, the catalytic chamber of catalyst converter, separator, inlet manifold and engine is sequentially connected in series；Accumulator is parallel between evaporator and air pump；The gas outlet of engine, exhaust manifold, the flue gas leading of catalyst converter, the three-element catalytic room of evaporator are sequentially connected in series.The present invention is by the energy recovery of engine discharge waste gas and re-uses, while for engine provides double fuel, the discharge of pollutant is also reduced while having saved the energy.

Description

A method for recovering waste heat from exhaust pipes of engines to improve the utilization rate of comprehensive fuel consumption of engines device

technical field

The invention belongs to the technical field of automobile energy saving and emission reduction, in particular to a device for reabsorbing, transforming and reusing engine exhaust waste heat to recover engine exhaust pipe waste heat and improve engine comprehensive fuel consumption utilization rate.

Background technique

Extensive use of ethanol gasoline is one of the methods of energy conservation and emission reduction in my country and the world. Ethanol gasoline is a new type of alternative energy that is formed by mixing fuel ethanol processed from grain and various plant fibers and ordinary gasoline in a certain proportion. According to my country's national standards, ethanol gasoline is blended with 90% regular gasoline and 10% fuel ethanol. The use of ethanol gasoline can save oil resources, reduce air pollution from vehicle exhaust, and promote agricultural production. However, ethanol gasoline has shortcomings that cannot be overcome at present. First, the most intuitive feeling for users is that it reduces the power of the car, which is not as powerful as ordinary gasoline. On the contrary, the fuel consumption increases. In addition, ethanol gasoline will be stratified once it meets water, so it cannot be transported by low-cost pipelines, and the storage and transportation period of ethanol gasoline is only 4-5 days, which affects the convenience of using ethanol gasoline. The amount of accumulation on the intake valve of the test car using ethanol gasoline is 33% higher than that of the car using 93# unleaded gasoline. This is because the instability of fuel ethanol increases the accumulation on the fuel intake system of the engine, which makes the atomization of the fuel injector poor, causing the combustion efficiency of ethanol gasoline to decrease, and the fuel consumption to increase.

At present, the method of recycling the waste heat of automobile exhaust is mainly power generation technology. The most common way is thermoelectric power generation. Since the heat utilization rate of the thermoelectric power generation sheet is less than 5%, the efficiency of converting heat energy into electrical energy is extremely low, and what is worse is the temperature difference. The voltage generated by power generation varies greatly with temperature, and storing electric energy in batteries requires high technical requirements and low efficiency. There are also some whimsical ideas in some patents that miniaturize the thermal power generation system and apply it to the power generation technology of automobile exhaust waste heat. First, the total efficiency of super-large thermal power plants does not exceed 40%, so the actual heat of this method The conversion efficiency can be imagined.

Contents of the invention

The object of the present invention is to provide a device for improving the utilization rate of the comprehensive fuel consumption of the engine in view of the above problems, a device for recovering the waste heat of the exhaust pipe of the engine and improving the utilization rate of the comprehensive fuel consumption of the engine. At the same time, dual fuel is provided for the engine, which can greatly reduce the emission of exhaust pollutants while saving energy.

The technical solution of the present invention is: a device for improving the comprehensive fuel consumption utilization rate of the engine, a device for recovering exhaust pipe waste heat of the engine and improving the comprehensive fuel consumption utilization rate of the engine, including an ethanol supply device A, an ethanol catalytic device B and an ethylene supply device C;

The ethanol supply device A includes an ethanol tank and a liquid pump; the ethanol catalytic device B includes an evaporator, an accumulator, an air pump, a catalytic converter and an exhaust manifold; the ethylene supply device C includes a water discharge valve, a separator, intake manifold and engine;

The catalytic converter includes an exhaust pipe and a catalytic chamber; the evaporator includes a three-way catalytic chamber and an evaporation chamber;

The liquid pump is installed on the connecting pipe between the evaporator and the ethanol tank; the evaporating chamber of the evaporator, the air pump, the catalytic chamber of the catalytic converter, the separator, the intake manifold and the air intake of the engine are sequentially connected in series The accumulator is connected in parallel between the evaporator and the air pump; the water discharge valve is connected to the bottom of the separator; sequentially connected in series.

In the above solution, the catalytic converter is ring-shaped, the middle is an exhaust gas pipe, and the outer circle is a catalytic chamber, and the exhaust gas pipe and the catalytic chamber are completely separated;

One end of the catalytic chamber is provided with an ethanol inlet, the other end is provided with an ethylene outlet, and both ends are provided with a catalyst inlet, and molecular sieves are loaded from the catalyst inlets at both ends and sealed tightly by a cover plate.

In the above solution, the catalytic converter further includes a deflector, and the deflector is installed in the catalytic chamber.

In the above scheme, the molecular sieve is any one of HZSM-5 molecular sieve, beta molecular sieve, ZSM-35 molecular sieve or 3A/4A/5A molecular sieve.

In the above scheme, the molecular sieve is HZSM-5 molecular sieve.

In the above scheme, the evaporator includes a three-way catalytic converter and an evaporation chamber;

The three-way catalytic converter is provided with a three-way catalytic chamber, which is completely separated from the evaporation chamber. One end of the evaporation chamber is provided with a liquid inlet, and the other end is provided with a gas outlet.

In the above solution, an overflow valve is also included; the overflow valve is connected in parallel between the evaporator and the ethanol tank.

In the above solution, a drain valve is provided at the bottom of the separator.

Compared with prior art, the beneficial effect of the present invention is:

1. The present invention adopts the above technical solutions, which can greatly reduce the exhaust heat load of the engine, significantly prolong the service life of the exhaust manifold, effectively reduce exhaust noise, and improve ride comfort.

2. The present invention adopts the method that ethanol with low calorific value is converted into ethylene with high calorific value after endothermic, catalyzed, and dehydrated, and the prepared ethylene is used in the combustion system of the engine, and the ethanol and gasoline are carried separately. It can effectively solve the problems of short ethanol gasoline storage period and strict oil supply system; since ethanol is not directly involved in the combustion system, there will be no problems of poor atomization of ethanol and blocked pipes; the equivalent calorific value of ethylene and the heat of gasoline The value is equivalent, and there will be no phenomenon that the engine power will be reduced like the use of ethanol gasoline.

3. The present invention adopts the heat of reaction required for ethanol catalytic dehydration from exhaust waste heat, which can significantly improve the overall thermal efficiency of the engine, and directly store the waste heat of exhaust gas in the chemical energy of ethylene, eliminating the need to convert heat energy into electric energy Or other intermediate low-efficiency links of kinetic energy, greatly improving the efficiency of energy recovery and utilization.

4. The catalytic converter of this solution can also be integrated with the exhaust manifold. The catalytic dehydration reaction of ethanol is an endothermic reaction, which is equivalent to a cooling system for the exhaust manifold, so the exhaust manifold can be designed with thin walls. It has a certain contribution to the lightweight of automobiles.

Description of drawings

Fig. 1: is the overall structural arrangement diagram of an embodiment of the present invention;

Figure 2: It is a schematic diagram of the front structure of an evaporator according to an embodiment of the present invention;

Figure 3: is a sectional view of Figure 2A-A;

Figure 4: is a schematic diagram of the side mechanism of the evaporator according to an embodiment of the present invention;

Fig. 5: is a schematic structural diagram of a catalytic converter according to an embodiment of the present invention;

Figure 6: is a sectional view of Figure 5B-B;

Figure 7: is a sectional view of Figure 5D-D;

Fig. 8: is the assembly front view of the catalytic converter of one embodiment of the present invention;

Figure 9: It is a side view of the assembly of the catalytic converter according to one embodiment of the present invention;

Fig. 10 is an exploded view of the assembly of the catalytic converter according to one embodiment of the present invention.

In the figure: 1. engine; 2. intake manifold; 3. separator; 4. drain valve; 5. exhaust manifold; 6. catalytic converter; 601. exhaust pipe; 6011. exhaust cavity; 602. ethanol Air inlet; 603, ethylene outlet; 604, deflector; 605, threaded hole; 606, catalytic chamber; 607, catalyst inlet; 608, molecular sieve; 609, screw; 610, cover plate; 611, sealing gasket; 7. Air pump; 8. Accumulator; 9. Evaporator; 901. Liquid inlet; 902. Three-way catalytic converter; 903. Air outlet; 904. Three-way catalytic chamber; 905. Evaporation chamber; 10. Overflow valve ; 11. Liquid pump; 12. Ethanol tank.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

Fig. 1 shows an embodiment of the device for recovering engine exhaust pipe waste heat of the present invention and improving the comprehensive fuel consumption utilization rate of the engine. In the existing automobile technology, after the automobile engine 1 works normally and stably, the temperature of the exhaust manifold 5 Above 600°C, while the temperature of the evaporator 9 with the three-way catalytic converter of the present invention is above 300°C. The device uses the waste heat of engine exhaust gas to dehydrate ethanol to prepare ethylene, and then participates in the combustion system with ethylene. The device for recovering waste heat from the exhaust pipe of the engine to improve the utilization rate of the comprehensive fuel consumption of the engine includes an ethanol supply device A, an ethanol catalytic device B and an ethylene supply device C.

The ethanol supply device A includes an ethanol tank 12, a liquid pump 11 and an overflow valve 10; the liquid pump 11 is installed on the connecting pipe between the evaporator 9 and the ethanol tank 12; the overflow valve 10 is connected in parallel to the evaporator Between the device 9 and the ethanol tank 12.

The ethanol catalytic device B includes an evaporator 9 , an accumulator 8 , an air pump 7 , a catalytic converter 6 and an exhaust manifold 5 .

As shown in Figures 2, 3 and 4, the evaporator 9 includes a three-way catalytic converter 902 and an evaporation chamber 905; Completely separated, one end of the evaporation chamber 905 is provided with a liquid inlet 901 , and the other end is provided with an air outlet 903 .

As shown in Figures 5, 6 and 7, the catalytic converter 6 is annular, the middle is a waste gas pipe 601, and the outer circle is a catalytic chamber 606, and the waste gas pipe 601 and the catalytic chamber 606 are completely separated; one end of the catalytic chamber 606 is provided There is an ethanol inlet 602, the other end is provided with an ethylene outlet 603, and both ends are provided with catalyst inlets 607, and molecular sieves 608 are loaded from the catalyst inlets 607 at both ends, and the catalytic The inlet of the device is sealed, and finally the screw 609 is screwed on, as shown in Figures 8, 9 and 10. The catalytic converter 6 also includes a deflector 604, which is installed in the catalytic chamber 606. Under the guidance of the deflector 604, the ethanol vapor advances in an S shape in the catalytic converter 6 at about 600°C. Let the ethanol have a longer walking distance, have a longer contact time with the catalyst, and catalyze more fully.

The molecular sieve 608 is any one of HZSM-5 molecular sieve, beta molecular sieve, ZSM-35 molecular sieve or 3A/4A/5A molecular sieve. Preferably, the molecular sieve 608 is HZSM-5 molecular sieve.

The ethylene supply device C includes a drain valve 4 , a separator 3 , an intake manifold 2 and an engine 1 . The bottom of the separator 3 is provided with a drain valve 4 .

The evaporation chamber 905 of the evaporator 9, the air pump 7, the catalytic chamber 606 of the catalytic converter 6, the separator 3, the intake manifold 2 and the intake port of the engine 1 are sequentially connected in series; the accumulator 8 is connected in parallel to the evaporation Between the device 9 and the air pump 7; the water discharge valve 4 is connected to the bottom of the separator 3; the air outlet of the engine 1, the exhaust manifold 5, the waste gas pipe 601 of the catalytic converter 6, and the three-way catalytic chamber of the evaporator 9 904 are sequentially connected in series. Wherein, the water discharge valve 4, the air pump 7 and the liquid pump 11 are all electronic control devices.

The entire ethylene catalytic system needs to be insulated and heat-insulated, and a layer of heat-insulating coating should be coated on the surface. .

Working process of the present invention is:

After the engine 1 works normally and stably, the liquid pump 11 extracts a certain amount of liquid ethanol from the ethanol tank 12 and enters the evaporation chamber 905 through the liquid inlet 901, and the liquid ethanol becomes ethanol vapor at 300° C. Energizer 8 and air pump 7 pump an appropriate amount of ethanol vapor at a constant speed to enter the catalytic chamber 606 from the ethanol inlet 602 of the catalytic converter 6. 6 advances in an S-shape, and is catalyzed by the catalyst HZSM-5 molecular sieve 608 to dehydrate into ethylene, and then it is exported from the ethylene outlet 603 through a pipeline and introduced into the separator 3. Since ethylene is insoluble in water, the ethylene is washed in sequence in the separator, It is dried and passed into the intake manifold 2 through the duct. When the engine 1 is inhaled, the ethylene mixed air is sucked into the cylinder together. After the engine 1 completes the combustion, the high-temperature exhaust gas is discharged from the exhaust manifold 5, and the high-temperature exhaust gas enters the three-way catalyst. In the three-way catalytic chamber 904 of the device 902, the harmful gas is changed into a harmless gas, so that the exhaust gas of the automobile can be purified. The high-temperature exhaust gas provides continuous heat for ethanol vaporization and catalytic dehydration. Through this set of devices, the benefits of energy saving, emission reduction and noise reduction of the engine can be achieved.

It should be understood that although this description is described according to various embodiments, not each embodiment only includes an independent technical solution, and this description of the description is only for clarity, and those skilled in the art should take the description as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions for feasible embodiments of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent embodiment or All changes should be included within the protection scope of the present invention.

Claims (8)

1. A device for recovering engine exhaust pipe waste heat and improving the utilization rate of comprehensive fuel consumption of the engine, characterized in that it comprises an ethanol supply device A, an ethanol catalytic device B and an ethylene supply device C; The ethanol supply device A includes an ethanol tank (12) and a liquid pump (11); the ethanol catalytic device B includes an evaporator (9), an accumulator (8), an air pump (7), a catalytic converter (6) and Exhaust manifold (5); said ethylene supply device C includes a drain valve (4), a separator (3), an intake manifold (2) and an engine (1); The catalytic converter (6) includes an exhaust pipe (601) and a catalytic chamber (606); the evaporator (9) includes a three-way catalytic chamber (904) and an evaporation chamber (905); The liquid pump (11) is installed on the connecting pipe between the evaporator (9) and the ethanol tank (12); the evaporation chamber (905), air pump (7), catalytic converter (6) of the evaporator (9) ) of the catalyst chamber (606), separator (3), intake manifold (2) and the intake port of the engine (1) are connected in series in sequence; the accumulator (8) is connected in parallel with the evaporator (9) and Between the air pump (7); the drain valve (4) is connected to the bottom of the separator (3); the gas outlet of the engine (1), the exhaust manifold (5), the waste gas pipe of the catalytic converter (6) ( 601), the three-way catalytic chamber (904) of the evaporator (9) are sequentially connected in series. 2. The device for recovering exhaust pipe waste heat of an engine according to claim 1 and improving the comprehensive fuel consumption utilization rate of the engine, characterized in that, the catalytic converter (6) is annular, the middle is an exhaust pipe (601), and the outer circle is a catalytic converter (601). The chamber (606), the waste gas pipe (601) and the catalytic chamber (606) are completely separated; One end of the catalytic chamber (606) is provided with an ethanol inlet (602), the other end is provided with an ethylene outlet (603), and both ends are provided with a catalyst inlet (607). The inlet (607) is sealed and tightly closed by the cover plate (610) after being packed into. 3. The device for recovering engine exhaust pipe waste heat according to claim 2 and improving the comprehensive fuel consumption utilization rate of the engine, characterized in that, the catalytic converter (6) also includes a deflector (604), and the deflector ( 604) installed in the catalytic cavity (606). 4. The device for recovering engine exhaust pipe waste heat according to claim 2 and improving the comprehensive fuel consumption utilization rate of the engine, wherein the molecular sieve (608) is HZSM-5 molecular sieve, beta molecular sieve, ZSM-35 molecular sieve or 3A/ Any one of 4A/5A molecular sieves. 5. The device for recovering exhaust pipe waste heat of an engine according to claim 4 and improving the utilization rate of comprehensive fuel consumption of the engine, wherein the molecular sieve (608) is HZSM-5 molecular sieve. 6. The device for recovering exhaust pipe waste heat of an engine according to claim 1 to improve the comprehensive fuel consumption utilization rate of the engine, wherein the evaporator (9) comprises a three-way catalytic converter (902) and an evaporation chamber (905); The three-way catalytic converter (902) is provided with a three-way catalytic chamber (904), the three-way catalytic chamber (904) is completely separated from the evaporation chamber (905), and one end of the evaporation chamber (905) is provided with a liquid inlet mouth (901), and the other end is provided with air outlet (903). 7. The device for recovering engine exhaust pipe waste heat according to claim 1 and improving the comprehensive fuel consumption utilization rate of the engine is characterized in that, it also includes an overflow valve (10); the overflow valve (10) is connected in parallel with the evaporator ( 9) and between the ethanol tank (12). 8. The device for recovering exhaust pipe waste heat of an engine according to claim 1 and improving the comprehensive fuel consumption utilization rate of the engine, characterized in that a drain valve (4) is provided at the bottom of the separator (3).